The diagram below (not to scale) shows a symmetrical arrangement of conductors in a 500m long 3-phase distribution line on a factory site. The individual conductors have a radius of 20mm and are arranged at the corners of an equilateral triangle with a distance between conductor centers (labelled D in the diagram) of 1000mm. The line is located in air which has a permitivity of 8.85-10-12 F/m. Which of the following corresponds to the capacitance of one phase to neutral for this 500m long section of line? D D D OA711x10- OB 1.42 x 10-8 F Oc1.42 x 10-11 F Op. 1.60µF S

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KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.